Inject thin wall PS cups without nitrogen accumulators?
Is it possible to inject thin wall PS cups, without nitrogen accumulators in the machine? Problem: Cavities do not fill completely.
Accumulators give your rapid fill rates and the relative viscosity of the material is low which reduces pressure build up in the mold. You can increase barrel temps to the high ends of resin specifications to ease but not eliminate flow issues
to further assit you the following: the flow lenght/wall ticknes are the main factors for yes or no for N2 accumulators. the venting is form extreem importancy for Ps burns easely. the machine must have an constant speed. in the case of an hotrunner the optimalisation of gating, temperature is very important.